<template>
  <div>
    <el-card class="box-card">
      <div slot="header" class="clearfix">
        <span>文章列表</span>
      </div>
      <!-- 搜索区域 -->
      <div class="search-box">
        <el-form :inline="true" :model="q">
          <el-form-item label="文章分类">
            <el-select v-model="q.cate_id" placeholder="请选择分类" size="small">
              <el-option
                v-for="obj in cateList"
                :key="obj.id"
                :label="obj.cate_name"
                :value="obj.id"
              ></el-option>
            </el-select>
          </el-form-item>
          <el-form-item label="发布状态" style="margin-left: 15px;">
            <el-select v-model="q.state" placeholder="请选择状态" size="small">
              <el-option label="已发布" value="已发布"></el-option>
              <el-option label="草稿" value="草稿"></el-option>
            </el-select>
          </el-form-item>
          <el-form-item>
            <el-button type="primary" size="small" @click="initArtList">筛选</el-button>
            <el-button type="info" size="small" @click="resetListFn">重置</el-button>
          </el-form-item>
        </el-form>
        <!-- 发表文章的按钮 -->
        <el-button type="primary" size="small" class="btn-pub" @click="showPubDialogFn">发表文章</el-button>
      </div>

      <!-- 文章表格区域 -->
      <!-- 文章表格区域 -->
      <el-table :data="artList" style="width: 100%;" border stripe>
        <el-table-column label="文章标题" prop="title">
          <template v-slot="scope">
            <el-link @click="showDetailFn(scope.row.id)">{{scope.row.title}}</el-link>
          </template>
        </el-table-column>
        <el-table-column label="分类" prop="cate_name"></el-table-column>
        <el-table-column label="发表时间" prop="pub_date">
          <template v-slot="scope">
            <span>{{$formatDate(scope.row.pub_date)}}</span>
          </template>
        </el-table-column>
        <el-table-column label="状态" prop="state"></el-table-column>
        <el-table-column label="操作">
          <el-table-column label="操作">
            <template v-slot="{ row }">
              <el-button type="danger" size="mini" @click="removeFn(row.id)">删除</el-button>
            </template>
          </el-table-column>
        </el-table-column>
      </el-table>
      <!-- 发表文章的 Dialog 对话框 -->
      <el-dialog
        title="发表文章"
        :visible.sync="pubDialogVisible"
        fullscreen
        :before-close="handleClose"
        @close="disChongZhi"
      >
        <el-form :model="pubForm" :rules="pubFormRules" ref="pubFormRef" label-width="100px">
          <el-form-item label="文章标题" prop="title">
            <el-input v-model="pubForm.title" placeholder="请输入标题"></el-input>
          </el-form-item>
          <el-form-item label="文章分类" prop="cate_id">
            <el-select v-model="pubForm.cate_id" placeholder="请选择分类" style="width: 100%;">
              <el-option
                v-for="obj in cateList"
                :key="obj.id"
                :label="obj.cate_name"
                :value="obj.id"
              ></el-option>
            </el-select>
          </el-form-item>
          <el-form-item label="文章内容" prop="content">
            <!-- 使用 v-model 进行双向的数据绑定 -->
            <quill-editor v-model="pubForm.content" @blur="conentChangeFn"></quill-editor>
          </el-form-item>
          <el-form-item label="文章封面" prop="cover_img">
            <!-- 用来显示封面的图片 -->
            <img src="../../assets/images/cover.jpg" alt class="cover-img" ref="imgRef" />
            <br />
            <!-- 文件选择框，默认被隐藏 -->
            <input
              type="file"
              style="display: none;"
              accept="image/*"
              ref="iptFileRef"
              @change="onCoverChangeFn"
            />
            <!-- 选择封面的按钮 -->
            <el-button type="text" @click="chooseImgFn">+ 选择封面</el-button>
            <el-form-item>
              <el-button type="primary" @click="pubArticleFn('已发布')">发布</el-button>
              <el-button type="info" @click="pubArticleFn('草稿')">存为草稿</el-button>
            </el-form-item>
          </el-form-item>
        </el-form>
      </el-dialog>
      <!-- 查看文章详情的对话框 -->
      <el-dialog title="文章预览" :visible.sync="detailVisible" width="80%">
        <h1 class="title">{{ artDetail.title }}</h1>

        <div class="info">
          <span>作者：{{ artDetail.nickname || artDetail.username }}</span>
          <span>发布时间：{{ $formatDate(artDetail.pub_date) }}</span>
          <span>所属分类：{{ artDetail.cate_name }}</span>
          <span>状态：{{ artDetail.state }}</span>
        </div>

        <!-- 分割线 -->
        <el-divider></el-divider>

        <!-- 文章的封面 -->
        <img :src="baseURL+artDetail.cover_img" alt />

        <!-- 文章的详情 -->
        <div v-html="artDetail.content" class="detail-box"></div>
      </el-dialog>
      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChangeFn"
        @current-change="handleCurrentChangeFn"
        :current-page.sync="q.pagenum"
        :page-sizes="[2, 3, 5, 10]"
        :page-size.sync="q.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      ></el-pagination>
    </el-card>
  </div>
</template>

<script>
import defaultImg from "@/assets/images/cover.jpg";
import {
  getArtCateListAPI,
  uploadArticleAPI,
  getArticleListAPI,
  getArticleDetailFn,
  delArtListAPI
} from "@/api";
import { baseURL } from "@/utils/request.js";
import { format } from "echarts";
export default {
  name: "ArtList",
  data() {
    return {
      baseURL: baseURL,
      detailVisible: false,
      // 查询参数对象
      q: {
        pagenum: 1,
        pagesize: 2,
        cate_id: "",
        state: ""
      },
      total: 0,
      artList: [],
      pubDialogVisible: false, // 控制发表文章对话框的显示与隐藏
      // ...其他
      pubForm: {
        // 表单的数据对象
        title: "",
        cate_id: "",
        content: "", // 文章的内容
        cover_img: null,
        state: ""
      },
      pubFormRules: {
        // 表单的验证规则对象
        title: [
          { required: true, message: "请输入文章标题", trigger: "blur" },
          {
            min: 1,
            max: 30,
            message: "文章标题的长度为1-30个字符",
            trigger: "blur"
          }
        ],
        cate_id: [
          { required: true, message: "请选择文章标题", trigger: "change" }
        ],
        content: [
          { required: true, message: "请输入文章内容", trigger: "blur" }
        ],
        cover_img: [
          { required: true, message: "请输入文章内容", trigger: "blur" }
        ]
      },
      cateList: [], // 文章分类
      artDetail: []
    };
  },
  methods: {
    // 发表文章按钮->点击事件->让添加文章对话框出现
    showPubDialogFn() {
      this.pubDialogVisible = true;
    },
    async initArtListFn() {
      const { data: res } = await getArtCateListAPI();
      this.cateList = res.data;
      // console.log(res.data);
    },
    async handleClose(done) {
      // 询问用户是否确认关闭对话框
      const confirmResult = await this.$confirm(
        "此操作将导致文章信息丢失, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);

      // 取消了关闭-阻止住, 什么都不干
      if (confirmResult === "cancel") return;
      // 确认关闭
      done();
    },
    chooseImgFn() {
      this.$refs.iptFileRef.click();
    },
    onCoverChangeFn(e) {
      // console.log(e);

      // 获取用户选择的文件列表
      const files = e.target.files;
      if (files.length === 0) {
        // 用户没有选择封面
        this.pubForm.cover_img = null;
        this.$refs.imgRef.setAttribute("src", defaultImg);
      } else {
        // 用户选择了封面
        this.pubForm.cover_img = files[0];
        const url = URL.createObjectURL(files[0]);
        this.$refs.imgRef.setAttribute("src", url);
      }
      this.$refs.pubFormRef.validateField("cover_img");
    },
    pubArticleFn(state) {
      this.pubForm.state = state;
      this.$refs.pubFormRef.validate(async valid => {
        if (valid) {
          const fn = new FormData();
          fn.append("title", this.pubForm.title);
          fn.append("cate_id", this.pubForm.cate_id);
          fn.append("content", this.pubForm.content);
          fn.append("cover_img", this.pubForm.cover_img);
          fn.append("state", this.pubForm.state);
          const { data: res } = await uploadArticleAPI(fn);
          if (res.code !== 0) return this.$message.error("发布文章失败！");
          this.$message.success("发布文章成功！");
          // console.log(this.pubForm);
          this.pubDialogVisible = false;
          // console.log(res);
          this.getArticleListList();
        } else {
          return false;
        }
      });
    },
    conentChangeFn() {
      this.$refs.pubFormRef.validateField("content");
    },
    disChongZhi() {
      this.$refs.pubFormRef.resetFields();
      this.$refs.imgRef.setAttribute("src", defaultImg);
    },
    async getArticleListList() {
      const { data: res } = await getArticleListAPI(this.q);
      this.artList = res.data;
      this.total = res.total;
      console.log(res);
    },
    handleSizeChangeFn(sizes) {
      this.q.pagesize = sizes;
      this.q.pagenum = 1;
      this.getArticleListList();
    },
    handleCurrentChangeFn(nowPage) {
      this.q.pagenum = nowPage;
      this.getArticleListList();
    },
    initArtList() {
      this.q.pagenum = 1;
      this.q.pagesize = 2;
      this.getArticleListList();
    },
    resetListFn() {
      this.q = {
        pagenum: 1,
        pagesize: 2,
        cate_id: "",
        state: ""
      };

      this.getArticleListList();
    },
    async showDetailFn(row) {
      this.detailVisible = true;
      // console.log(row);
      const { data: res } = await getArticleDetailFn(row);
      console.log(res);
      this.artDetail = res.data;
    },
    async removeFn(id) {
      // 执行删除的操作
      const { data: res } = await delArtListAPI(id);

      if (res.code !== 0) return this.$message.error("删除失败!");
      this.$message.success("删除成功!");
      // 刷新列表数据
      if (this.artList.length === 1) {
        if (this.q.pagenum > 1) {
          this.q.pagenum--;
        }
      }
      this.getArticleListList();
    }
  },
  created() {
    this.initArtListFn();
    this.getArticleListList();
  }
};
</script>

<style lang="less" scoped>
.search-box {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  .btn-pub {
    margin-top: 5px;
  }
}
::v-deep .ql-editor {
  min-height: 300px;
}
// 设置图片封面的宽高
.cover-img {
  width: 400px;
  height: 280px;
  object-fit: cover;
}
.title {
  font-size: 24px;
  text-align: center;
  font-weight: normal;
  color: #000;
  margin: 0 0 10px 0;
}

.info {
  font-size: 12px;
  span {
    margin-right: 20px;
  }
}

// 修改 dialog 内部元素的样式，需要添加样式穿透
::v-deep .detail-box {
  img {
    width: 500px;
  }
}
</style>
